The file at the this path: OpenOfficePortable\Data\fonts\add_fonts_here.txt

If you read that file it mentions LibreOffice all the time, there is no mention of OpenOffice at all. Given that for the time being a separate font pack has to be downloaded and 'installed' by the users if they want all the fonts some (new) users of OpenOffice might be confused by the references to LibreOffice in that text file.

It's a minor point but I'll add it to the todo list if OpenOffice ever does another release. It's looking unlikely as it took them months just to get a security patch out. I'd highly suggest switching to LibreOffice.